Replacing crossover in Apogee Centaur Majors?

Hi,

I love my Apogees and would like to make them sound even better by replacing the crossover internals with better quality components and material. A local electronics business owner (Mark at Mr. Wizards in Austin) can do the work if I provide him with the material and some instruction to get started. He is very familiar with hi-fi gear and can do the work once I have outlined the project for him.

Can anyone be of assistance regarding what is exactly needed for this project? I am thinking that I ultimately need replacement caps and the appropriate conductors for the wire runs and coil windings. I was leaning towards Auricaps (although exact specs is unkown). I'm unsure of what wire is needed. Does anyone have any information that would at least get me started with figuring out what I need to know?

Thanks a bunch.